玉米植株成熟时有许多外观特征。大多数生产者都知道籽粒基部出现黑层即标志灌浆停止,但不了解籽粒乳线的位置也是指示玉米成熟的有用标志。玉米籽粒凹陷后,很快在胚乳一侧出现乳线。它是籽粒中固态胚乳和液态胚乳的交界(图)。当果穗最顶部的淀粉或胚乳变硬时颜色变黄,而果穗最基部的胚乳仍保持乳白状。随 Corn plants have many appearance characteristics when they mature. Most producers know that a black layer at the base of the grain marks the end of the filling process, but not understanding the location of the kernels is also a useful indicator of the maturity of the corn. After the corn kernels are sunken, milk lines appear on the endosperm side quickly. It is the junction of solid endosperm and liquid endosperm in the grain (fig). When the top of the ear of starch or endosperm hardens yellow, while the ear base of the endosperm remains milky white. With